Remove role="form" on a form element.

Role Form should be use on a region of the document that  represents a collection of form-associated elements.
<div role=”form”></div> GOOD
<form role=”form”></form> BAD

templates/default/password.html

@@ -16,7 +16,7 @@
         <article class="col-main" role="main" aria-labelledby="main-label">
             <h1 id="main-label" class="page-header">{intl l="Password Forgotten"}</h1>
             {form name="thelia.front.customer.lostpassword"}
-            <form id="form-forgotpassword" action="{url path="/password"}" method="post" role="form">
+            <form id="form-forgotpassword" action="{url path="/password"}" method="post">
 
                 <p>{intl l="Please enter your email address below."} {intl l="You will receive a link to reset your password."}</p>
                 {form_field form=$form field="email"}